package com.foreknow.controller;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

public class CookieDemo extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //1.创建一个cookie对象,Cookie只能存小文本信息,容量为4k
        //Cookie cookie = new Cookie("name","tom123");
        //2.设置cookie的有效时间(时间以秒为单位)
        //cookie.setMaxAge(1*30*24*60*60);
        //3.将cookie发送给客户端浏览器保存
        //resp.addCookie(cookie);

        //如何获取到客户端发送的cookie
        PrintWriter out = resp.getWriter();
        Cookie[] cookies = req.getCookies();
        if (cookies != null) {
            for (Cookie c : cookies) {
                String name = c.getName();
                String value = c.getValue();
                out.println(name + "-----" + value);
            }
        } else {
            out.println("没有找到Cookie的数据");
        }
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

    }
}
